diff --git a/Controllers/AppUsersController.cs b/Controllers/AppUsersController.cs
index b12ad0e..f93ade2 100644
--- a/Controllers/AppUsersController.cs
+++ b/Controllers/AppUsersController.cs
@@ -8,12 +8,12 @@ using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Http;
 using TicketManager.Data;
 using TicketManager.Models;
-using TicketManager.DTO;
+using TicketManager.Resources;
 
 
 namespace TicketManager.Controllers
 {
-    // [Authorize]
+    [Authorize]
     [Produces("application/json")]
     [Route("api/v1/users")]
     [ApiController]
diff --git a/Controllers/ProjectsController.cs b/Controllers/ProjectsController.cs
index 083eae4..c06bfb0 100644
--- a/Controllers/ProjectsController.cs
+++ b/Controllers/ProjectsController.cs
@@ -7,13 +7,13 @@ using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
 using TicketManager.Data;
 using TicketManager.Models;
-using TicketManager.DTO;
+using TicketManager.Resources;
 using System;
 
 namespace TicketManager.Controllers
 {
     // [Authorize(Roles = "Admin")]
-    // [Authorize]
+    [Authorize]
     [Produces("application/json")]
     [Route("api/v1/[controller]")]
     [ApiController]
@@ -180,6 +180,9 @@ namespace TicketManager.Controllers
                 EndingDate = projectDto.EndingDate,
                 Manager = await _context.AppUsers.FindAsync(projectDto.ManagerId)
             };
+            // project.LogAction(
+            //     $"{project.Title} has been created by {project.Manager.FullName}.",
+            //     ActivityType.StartTask);
 
             _context.Projects.Add(project);
             await _context.SaveChangesAsync();
diff --git a/Controllers/TicketsController.cs b/Controllers/TicketsController.cs
index 7ee7035..4895621 100644
--- a/Controllers/TicketsController.cs
+++ b/Controllers/TicketsController.cs
@@ -5,12 +5,12 @@ using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
 using TicketManager.Data;
-using TicketManager.DTO;
+using TicketManager.Resources;
 using TicketManager.Models;
 
 namespace TicketManager.Controllers
 {
-    // [Authorize]
+    [Authorize]
     [Route("api/v1/[controller]")]
     [ApiController]
     public class TicketsController : ControllerBase
diff --git a/Models/Activity.cs b/Models/Activity.cs
index 549adf2..60a98a9 100644
--- a/Models/Activity.cs
+++ b/Models/Activity.cs
@@ -8,7 +8,7 @@ namespace TicketManager.Models
         public string Description { get; set; }
         public DateTime UpdateDate { get; private set; } = DateTime.Now;
         public ActivityType ActivityType { get; set; } = ActivityType.Undefined;
-        public AppUser User { get; set; }
-        public int UserId { get; set; }
+        // public Guid UserId { get; set; }
+        public int TaskId { get; set; }
     }
 }
\ No newline at end of file
diff --git a/Models/AppUser.cs b/Models/AppUser.cs
index 28c0660..9dd2315 100644
--- a/Models/AppUser.cs
+++ b/Models/AppUser.cs
@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.Linq;
+using System.Text.Json.Serialization;
 
 namespace TicketManager.Models
 {
@@ -39,6 +40,7 @@ namespace TicketManager.Models
         [Display(Name = "Avatar")]
         public string Picture { get; set; }
 
+        [JsonIgnore]
         public List<Assignment> Assignments { get; set; } = new List<Assignment>();
 
         [Display(Name = "Activity")]
diff --git a/Models/Interfaces/ITask.cs b/Models/Interfaces/ITask.cs
index eba4cf7..fd86e71 100644
--- a/Models/Interfaces/ITask.cs
+++ b/Models/Interfaces/ITask.cs
@@ -3,25 +3,13 @@ using System.Collections.Generic;
 
 namespace TicketManager.Models
 {
-    // public interface ITask
-    public abstract class ITask
+    public interface ITask
     {
         int Id { get; set; }
         string Title { get; set; }
         string Description { get; set; }
         DateTime CreationDate { get; }
-        DateTime PlannedEnding { get; set; }
+        DateTime EndingDate { get; set; }
         List<Activity> Activities { get; set; }
-
-        public virtual void AddLogEntry(string description)//, User user)
-        {
-            Activity Activity = new Activity()
-            {
-                Description = description,
-                ActivityType = ActivityType.Undefined,
-                // User = user,
-            };
-            Activities.Add(Activity);
-        }
     }
 }
diff --git a/Models/Project.cs b/Models/Project.cs
index cf32255..e8b3ec3 100644
--- a/Models/Project.cs
+++ b/Models/Project.cs
@@ -2,7 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.ComponentModel.DataAnnotations;
-using TicketManager.DTO;
+using System.Text.Json.Serialization;
 
 namespace TicketManager.Models
 {
@@ -20,11 +20,13 @@ namespace TicketManager.Models
         public string Description { get; set; }
 
         [DataType(DataType.Date)]
-        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = false)]
+        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}",
+        ApplyFormatInEditMode = false)]
         public DateTime CreationDate { get; private set; } = DateTime.Now;
 
         [DataType(DataType.Date)]
-        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
+        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}",
+        ApplyFormatInEditMode = true)]
         public DateTime EndingDate { get; set; }
 
         [Display(Name = "Progress")]
@@ -45,6 +47,7 @@ namespace TicketManager.Models
         [Display(Name = "Project Manager")]
         public AppUser Manager { get; set; }
 
+        [JsonIgnore]
         public List<Assignment> Assignments { get; set; } = new List<Assignment>();
 
         public List<Ticket> Tickets { get; set; } = new List<Ticket>();
@@ -109,5 +112,17 @@ namespace TicketManager.Models
         {
             this.Status = Status.Done;
         }
+
+        public void LogAction(string description, ActivityType type = ActivityType.Undefined)//, Guid userId)
+        {
+            Activity Activity = new Activity()
+            {
+                Description = description,
+                ActivityType = type,
+                TaskId = this.Id,
+                // UserId = userId
+            };
+            Activities.Add(Activity);
+        }
     }
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index 0eb16a8..a01d101 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,6 @@
 
 - `React` client on the front-end (TypeScript)
 - [Materialize](https://materializecss.com) CSS librairy for styling
-- API: Newtonsoft.Json, to avoid cycle errors
 - Hosting: ?
 - Authentication : [Auth0](https://auth0.com/)
 - Analytics : Google Analytics & Mixpanel
@@ -48,6 +47,6 @@
 - [ ] error page redirect when offline.
 - [x] ticket/files/activities list placeholders when empty
 - [ ] think about public/private DTO's constructor, getters and setters
-- [x] write dtos without circular dependencies
+- [<span style="color:red">X</span>] write dtos without circular dependencies.
 - [ ] use dtoRequest for PutProjects
 - [ ] render avatarlist after UserModal Update
diff --git a/DTOs/AppUser/AppUserDTO.cs b/Resources/AppUser/AppUserDTO.cs
similarity index 97%
rename from DTOs/AppUser/AppUserDTO.cs
rename to Resources/AppUser/AppUserDTO.cs
index da918b7..c942884 100644
--- a/DTOs/AppUser/AppUserDTO.cs
+++ b/Resources/AppUser/AppUserDTO.cs
@@ -4,7 +4,7 @@ using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using TicketManager.Models;
 
-namespace TicketManager.DTO
+namespace TicketManager.Resources
 {
     public class AppUserDTO
     {
diff --git a/DTOs/AppUser/AppUserDTORead.cs b/Resources/AppUser/AppUserDTORead.cs
similarity index 97%
rename from DTOs/AppUser/AppUserDTORead.cs
rename to Resources/AppUser/AppUserDTORead.cs
index a814720..494476a 100644
--- a/DTOs/AppUser/AppUserDTORead.cs
+++ b/Resources/AppUser/AppUserDTORead.cs
@@ -4,7 +4,7 @@ using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using TicketManager.Models;
 
-namespace TicketManager.DTO
+namespace TicketManager.Resources
 {
     public class AppUserDTORead
     {
diff --git a/DTOs/AppUser/NewAppUserDTO.cs b/Resources/AppUser/NewAppUserDTO.cs
similarity index 92%
rename from DTOs/AppUser/NewAppUserDTO.cs
rename to Resources/AppUser/NewAppUserDTO.cs
index f99ae3d..824e8fe 100644
--- a/DTOs/AppUser/NewAppUserDTO.cs
+++ b/Resources/AppUser/NewAppUserDTO.cs
@@ -1,6 +1,6 @@
 using System.ComponentModel.DataAnnotations;
 
-namespace TicketManager.DTO
+namespace TicketManager.Resources
 {
     public class NewAppUserDTO
     {
diff --git a/DTOs/Project/NewProjectDTO.cs b/Resources/Project/NewProjectDTO.cs
similarity index 90%
rename from DTOs/Project/NewProjectDTO.cs
rename to Resources/Project/NewProjectDTO.cs
index b696398..e6d1bf9 100644
--- a/DTOs/Project/NewProjectDTO.cs
+++ b/Resources/Project/NewProjectDTO.cs
@@ -1,7 +1,7 @@
 using System;
 using System.ComponentModel.DataAnnotations;
 
-namespace TicketManager.DTO
+namespace TicketManager.Resources
 {
     public class NewProjectDTO
     {
diff --git a/DTOs/Project/ProjectDTO.cs b/Resources/Project/ProjectDTO.cs
similarity index 97%
rename from DTOs/Project/ProjectDTO.cs
rename to Resources/Project/ProjectDTO.cs
index 6be538a..5da13c7 100644
--- a/DTOs/Project/ProjectDTO.cs
+++ b/Resources/Project/ProjectDTO.cs
@@ -3,7 +3,7 @@ using System.Linq;
 using System.Collections.Generic;
 using TicketManager.Models;
 
-namespace TicketManager.DTO
+namespace TicketManager.Resources
 {
     public class ProjectDTO
     {
diff --git a/DTOs/Project/ProjectDTORequest.cs b/Resources/Project/ProjectDTORequest.cs
similarity index 96%
rename from DTOs/Project/ProjectDTORequest.cs
rename to Resources/Project/ProjectDTORequest.cs
index 374c051..ea14bae 100644
--- a/DTOs/Project/ProjectDTORequest.cs
+++ b/Resources/Project/ProjectDTORequest.cs
@@ -3,7 +3,7 @@ using System.Linq;
 using System.Collections.Generic;
 using TicketManager.Models;
 
-namespace TicketManager.DTO
+namespace TicketManager.Resources
 {
     public class ProjectDTORequest
     {
diff --git a/DTOs/Tickets/NewTicketDTO.cs b/Resources/Tickets/NewTicketDTO.cs
similarity index 94%
rename from DTOs/Tickets/NewTicketDTO.cs
rename to Resources/Tickets/NewTicketDTO.cs
index ef7629c..45864d2 100644
--- a/DTOs/Tickets/NewTicketDTO.cs
+++ b/Resources/Tickets/NewTicketDTO.cs
@@ -4,7 +4,7 @@ using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using TicketManager.Models;
 
-namespace TicketManager.DTO
+namespace TicketManager.Resources
 {
     public class NewTicketDTO
     {
diff --git a/DTOs/Tickets/TicketDTO.cs b/Resources/Tickets/TicketDTO.cs
similarity index 93%
rename from DTOs/Tickets/TicketDTO.cs
rename to Resources/Tickets/TicketDTO.cs
index 3d7154f..46cfe75 100644
--- a/DTOs/Tickets/TicketDTO.cs
+++ b/Resources/Tickets/TicketDTO.cs
@@ -4,7 +4,7 @@ using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using TicketManager.Models;
 
-namespace TicketManager.DTO
+namespace TicketManager.Resources
 {
     public class TicketDTO
     {
@@ -20,7 +20,7 @@ namespace TicketManager.DTO
             Difficulty = ticket.Difficulty.ToString();
             Category = ticket.Category.ToString();
             CreatorId = ticket.CreatorId;
-            Project = new ProjectDTORequest(ticket.Project);
+            Project = ticket.Project != null ? new ProjectDTORequest(ticket.Project) : null;
             Notes = ticket.Notes;
             Activities = ticket.Activities;
             Files = ticket.Files;
diff --git a/DTOs/Tickets/TicketDTORead.cs b/Resources/Tickets/TicketDTORead.cs
similarity index 97%
rename from DTOs/Tickets/TicketDTORead.cs
rename to Resources/Tickets/TicketDTORead.cs
index edf131d..620a044 100644
--- a/DTOs/Tickets/TicketDTORead.cs
+++ b/Resources/Tickets/TicketDTORead.cs
@@ -4,7 +4,7 @@ using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using TicketManager.Models;
 
-namespace TicketManager.DTO
+namespace TicketManager.Resources
 {
     public class TicketDTORead
     {
diff --git a/Startup.cs b/Startup.cs
index 0d096d2..e358b50 100644
--- a/Startup.cs
+++ b/Startup.cs
@@ -12,9 +12,7 @@ using Microsoft.Extensions.Logging;
 using Microsoft.AspNetCore.SpaServices.ReactDevelopmentServer;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.OpenApi.Models;
-using Microsoft.AspNetCore.Mvc.NewtonsoftJson;
 using Microsoft.AspNetCore.Authentication.JwtBearer;
-using Newtonsoft.Json;
 using TicketManager.Data;
 
 [assembly: ApiController]
@@ -48,12 +46,7 @@ namespace TicketManager
                 options.Audience = "https://localhost:5001/api/V1/";
             });
 
-            services.AddControllers()
-            .AddNewtonsoftJson(options =>
-                {
-                    options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore; // avoid cycle ref errors
-                }
-            );
+            services.AddControllers();
 
             services.AddSpaStaticFiles(configuration =>
             {
diff --git a/Tests/TicketManager.Tests/UnitTests/ControllersTests/ProjectControllerTests.cs b/Tests/TicketManager.Tests/UnitTests/ControllersTests/ProjectControllerTests.cs
index 43892b1..8748691 100644
--- a/Tests/TicketManager.Tests/UnitTests/ControllersTests/ProjectControllerTests.cs
+++ b/Tests/TicketManager.Tests/UnitTests/ControllersTests/ProjectControllerTests.cs
@@ -8,7 +8,7 @@ using Microsoft.Data.Sqlite;
 using TicketManager.Controllers;
 using TicketManager.Data;
 using TicketManager.Models;
-using TicketManager.DTO;
+using TicketManager.Resources;
 
 
 namespace TicketManager.Tests
diff --git a/client/src/components/UsersModal.tsx b/client/src/components/UsersModal.tsx
index 3507907..7d88fd7 100644
--- a/client/src/components/UsersModal.tsx
+++ b/client/src/components/UsersModal.tsx
@@ -1,4 +1,4 @@
-import React, { FC, useState, ChangeEvent, useEffect, FormEvent } from "react";
+import React, { FC, useState, ChangeEvent, FormEvent, useEffect } from "react";
 import { Modal } from "./Modal";
 import { AvatarList } from "./AvatarList";
 import { User } from "../types/User";
@@ -10,9 +10,9 @@ import { useParams } from "react-router-dom";
 
 interface IProps {
   show: boolean;
-  handleClose: () => void;
   users: User[];
   allUsers: User[];
+  handleClose(): void;
 }
 
 export const UsersModal: FC<IProps> = ({
diff --git a/client/src/controllers/ErrorController.tsx b/client/src/controllers/ErrorController.tsx
index 4376691..0f00683 100644
--- a/client/src/controllers/ErrorController.tsx
+++ b/client/src/controllers/ErrorController.tsx
@@ -2,7 +2,7 @@ import React, { FC } from "react";
 import { Redirect } from "react-router-dom";
 
 interface IProps {
-  error: any;
+  error: string;
 }
 
 export const ErrorController: FC<IProps> = ({ error }) => {
@@ -10,6 +10,9 @@ export const ErrorController: FC<IProps> = ({ error }) => {
     case "Bad Request":
       return <Redirect to="/400" />;
 
+    case "Unauthorized":
+      return <Redirect to="/401" />;
+
     case "Not Found":
       return <Redirect to="/404" />;
 
diff --git a/client/src/controllers/ProjectController.tsx b/client/src/controllers/ProjectController.tsx
index 6db808b..0252cd5 100644
--- a/client/src/controllers/ProjectController.tsx
+++ b/client/src/controllers/ProjectController.tsx
@@ -28,6 +28,7 @@ export const ProjectController: FC = () => {
         setIsLoading(false);
       }
     } catch (ex) {
+      console.error(ex);
       setHasError(true);
       setError(ex);
     }
@@ -42,8 +43,8 @@ export const ProjectController: FC = () => {
         setAllUsers((response.parsedBody as unknown) as User[]);
       }
     } catch (ex) {
-      // setHasError(true);
-      // setError(ex);
+      setHasError(true);
+      setError(ex);
     }
   }
 
diff --git a/client/src/utils/http.ts b/client/src/utils/http.ts
index a600ab9..e3bc88e 100644
--- a/client/src/utils/http.ts
+++ b/client/src/utils/http.ts
@@ -56,5 +56,7 @@ export async function patch<T>(
 
 const headers: Headers = new Headers({
   Accept: "application/json",
-  "Content-Type": "application/json"
+  "Content-Type": "application/json",
+  Authorization:
+    "Bearer eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6Ik1UWkNSRFEzUkRnd1FUQXlNRFExTmtOQ09UQXlSamhGTURaRU1Ea3pNRGxHUkRrelFqZENSZyJ9.eyJpc3MiOiJodHRwczovL2Rldi1meWpydm9oeC5hdXRoMC5jb20vIiwic3ViIjoiR3dlZTlGUnN3ejNWNE5vZFVRTjJIcjJyQjJTMDI1UmZAY2xpZW50cyIsImF1ZCI6Imh0dHBzOi8vbG9jYWxob3N0OjUwMDEvYXBpL1YxLyIsImlhdCI6MTU4Mjk3MTQyMSwiZXhwIjoxNTgzMDU3ODIxLCJhenAiOiJHd2VlOUZSc3d6M1Y0Tm9kVVFOMkhyMnJCMlMwMjVSZiIsImd0eSI6ImNsaWVudC1jcmVkZW50aWFscyJ9.mH_ejE0gpMXrMIVUV7afuagTopCxm2x7F7Ash9L7zfOCQnw71E7NPsEh8w2_nFFz3lwm988vGbJhB_1G0oetK3VnqgahHn-ZJfk8RhQeKZQtCddbFCXSZzbsvi8XekpN2qLSZswrfxM4hiNfedQW1sM6wSbVbv4q6MrpPrtnepOo5lu67b9eHQZA5MQGqCLqqAZtEAa4Z8bVUCUcf3wU4e9W38LngrMSEMN62_ZZ8AVnjFVQ97zWEadJhYT54S9tVioY8jNR-38qjuYH_ZP3mVQg8INza9YFiYzIsIgdYufhorb_cSXc1qK1ZhHf4kRHaiHCYan-c9nN9SM9MCYA9A"
 });
diff --git a/client/src/utils/router.tsx b/client/src/utils/router.tsx
index 6b88795..8d99a96 100644
--- a/client/src/utils/router.tsx
+++ b/client/src/utils/router.tsx
@@ -39,7 +39,7 @@ export const AppRouter = () => {
             <TicketController />
           </Route>  */}
 
-          <Route path="/404">
+          <Route path="/401">
             <NotFoundPage />
           </Route>
         </Switch>